The vco is optimized according to the targets of low voltage - supply , low power consumption , low phase noise and large tuning range . with a voltage - supply of 与由反型mos变容管调谐的压控振荡器比较,结果表明积累型变容管调谐的vco具有更好的相位噪声性能。
Synthesizers with low phase noise , highly pure spectrum , high resolution and fast frequency jump speed have dominating development direction of the frequency synthesis technology 低相位噪声、高纯频谱、高分辨率和高速频率捷变成为频率合成技术发展的主要趋势。
It admits of no delay to develop high stability crystal oscillator and enhance its phase noise index to reduce the effect of jitter to the performance of the whole system 研制高稳定晶体振荡器,提高相位噪声指标、减少抖动对整体性能的影响,已经成为刻不容缓的任务。
Dr is made of microwave ceramic with high dielectric constant and very low loss . using dr , the phase noise of an oscillator could be made to be extremely low 介质谐振器( dr )由高介电常数、低损耗的微波陶瓷材料制作而成,它能极其容易地实现微波频率源的低相位噪声。
It also presents the items that should be pay attention to when we make the measurement , and analyses the factors that influence the phase noise measurement 指出在高频雷达发射信号相位噪声测量中应注意的问题，并对影响高频雷达发射信号相位噪声测量的因素进行了分析。
Theoretical analysis and simulation results show that it is mainly flicker noise , not phase or frequency white noise , that affects bistatic sar imaging performance 理论分析和仿真试验证实了影响双基地sar成像的相位噪声主要是闪烁频率噪声,而不是白噪声调相或白噪声调频。
The measurement precision mainly depends on two aspect , one is the phase noise of frequency standard , the other is the linearity of phase detector in the range from 0 to 360 此方法测量精度的高低，主要取决于两个方面，即频率标准本身相位噪声的情况和在0 360范围内鉴相的线性度。
It has the advantage of high frequency resolution and low phase noise when compared with traditional integer - n phase locked loop ( npll ) frequency synthesis 分数分频( fnpll )频率合成器则是近年来出现的一种新技术，它与传统的整数分频频率合成器相比具有频率分辨率高、相位噪声低等优点。
Based on the analysis of transistor amplifier noise model , we select devices with low noise in reason . and the method how to reduce phase noise and phase jitter is also discussed 依据晶体管放大器的噪声模型分析合理选择了低噪声的元器件,对降低相位噪声和相位抖动的方法作了一些探讨。
The article starts with the vibrating impact on the crystal oscillator in the radar frequency synthesizer , and analyses the phase noises of crystal oscillator under the random vibration condition 摘要从振动对雷达频综器中晶体振荡器的影响入手，分析晶体振荡器在随机振动条件下的相位噪声。
